$W$ mass in a model with vector-like leptons and $U(1{)}^{\prime }$

Abstract

We study the effects of vector-like leptons on the $W$ boson mass in a model with a vector-like $U(1{)}^{\prime }$ gauge symmetry. This model provides simultaneous explanations for the recent anomalies in the muon anomalous magnetic moment and the semi-leptonic decays of $B$ mesons. We found that the recent result of the $W$ boson mass precise measurement at CDF can be explained if the charged (neutral) vector-like lepton is lighter than 250 (80) GeV. The light vector-like leptons may not be excluded by collider experiments if these decay to a physical mode of the $U(1{)}^{\prime }$ breaking scalar field.

Comments: 16 pages, 4 figures; ver2 matched to published version